JP4911119B2 - Air conditioner outdoor unit - Google Patents

Description

  The present invention relates to an outdoor unit of an air conditioner, more specifically, by increasing the heat dissipation of the heat generating component by providing heat sinks on two sides of the electrical component box, respectively, or opening the front of the electrical component box, Or, it relates to a structure that allows maintenance even when the front lid is closed.

  A conventional outdoor unit (outdoor unit) of an air conditioner solves the problem that water splashed from a blower fan enters the electrical component box, and a blower chamber (not shown) and a unit as shown in FIG. The printed circuit board a and b, and the electrical component box e composed of the terminal block c and the reactor d are provided with a printed circuit board a on the side surface f of the electrical component box e on the blower chamber side. And a cover h that covers the openings g and g ′ that connect the electrical component box e and the blower chamber, and a holder j that has an opening i that faces the heat generating component a ′ in the center is integrally formed. What was provided was disclosed (for example, refer Unexamined-Japanese-Patent No. 2001-317767).

  The electrical component box e is provided with a heat sink k on a side surface f formed so as to face a blower chamber (not shown). The heat sink k flows in the air flow toward the blower outlet (not shown) through the blower chamber. Although heat is dissipated by contact, there is a need to add a control circuit to improve energy saving performance or remove harmful electrical noise, and the heat sink k is connected to the side surface f of the electrical component box e. There has been no disclosure of a configuration that can dissipate heat by air cooling when the printed circuit boards a and b on which components that generate heat are mounted are provided on two fixing side surfaces, each of which includes another side surface f ′.

  In addition, a configuration capable of performing maintenance work on a part of the electrical component even when the side surfaces including the side surface f and the other side surface f ′ constituting the electrical component box e and the upper and lower surfaces are closed. Therefore, the maintenance workability is not good, which is inconvenient.

Further, there has been no disclosure of a configuration in which, for example, when a power supply board on which a capacitor is mounted as a heat generating component is provided in the electrical component box e, the capacitor can be blown with air to cool it.
JP 2001-317767 A

  Accordingly, the present invention has been made to solve the above-described problems, and its purpose is to improve heat dissipation of the heat-generating component by providing heat sinks on the two side surfaces of the electrical component box, respectively, in front of the electrical component box. An object of the present invention is to provide an outdoor unit for an air conditioner that can be maintained even when it is opened or closed with a front cover.

  In order to achieve the above-described object, the present invention has the following features.

A plurality of boards in which the interior is partitioned into a machine room including a compressor and an electrical component box by a partition plate and a heat exchanger chamber including a heat exchanger and a blower fan, and the electrical component is mounted on the electrical component box In an air conditioner outdoor unit in which
The electrical component box has one side portion arranged side by side with the partition plate, a back surface portion joined to the partition plate in the vicinity of the same side portion, and a joining member composed of the other side portion connected to the back surface portion, and the one side A front lid that is detachably attached to the front part between the front part and the other side part, and a bottom part that constitutes a ventilation casing,
A main control board constituting the boards is mounted on the front cover, a power supply board for the compressor is mounted on the other side, and a first heat sink is provided among a plurality of control boards requiring a heat sink. One control board is mounted on the one side, the other control board with a second heat sink is mounted on the back surface, and a power supply board with a heat generating component is placed in the ventilation casing on the bottom surface. It is characterized by being mounted.

  In addition, a first temporary fixing portion that temporarily fixes the electric component box to one side and the other side, and the front lid corresponding thereto, when the front lid is attached, and the other side of the front lid. A second temporary fixing portion that is temporarily fixed when the front portion is opened by turning one side at the center is provided.

  In addition, the front cover of the electrical component box is located behind the front end of the one side.

  According to the present invention, by providing heat sinks on the two side surfaces of the electrical component box, respectively, heat dissipation of the heat generating component is improved, and maintenance can be performed even when the front part of the electrical component box is opened or closed with the front lid. An air conditioner outdoor unit can be provided.

  Next, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view of an outdoor unit of an air conditioner according to the present invention as viewed from the front side, FIG. 2 is a perspective view of the outdoor unit of the air conditioner according to the present invention as viewed from the back side, and FIG. FIG. 4 is a perspective view showing a state in which a front panel and an electrical component box in the front of the machine room of the outdoor unit of the air conditioner are removed, and FIG. 4 shows a machine room and a heat exchanger room of the outdoor unit of the air conditioner according to the invention 5 is a perspective view of a first main part of an outdoor unit of an air conditioner according to the present invention, and FIG. 6 is a perspective view of a second main part of the outdoor unit of the air conditioner according to the present invention. 7 is a perspective view of a third main part of the outdoor unit of the air conditioner according to the present invention, and FIG. 8 is a perspective view of a fourth main part of the outdoor unit of the air conditioner according to the present invention. 9 is a fifth perspective view of the fifth essential part of the outdoor unit for an air conditioner according to the present invention.

  As shown in FIGS. 1 to 4, the outdoor unit of the air conditioner according to the present invention is configured such that the upper portion of the bottom plate 1 having the leg portions 1 a is separated from the compressor 3 by the partition plate 2 erected on the bottom plate 1. A machine room 5 installed near the front on the bottom plate 1 and an electrical component box 4 installed on the top of the compressor 3 and a heat exchanger 6 are installed near the rear on the bottom plate 1. It has the structure divided into the heat exchanger chamber 8 which installed the ventilation fan 7 facing.

  The bottom plate 1 has a large front cover 14 having a blower outlet 141 so as to face the blower fan 7, a small front panel 14a covering the front of the machine room 5, a side panel 15 and the like. The upper part is covered with the upper surface panel 16, and the compressor 3, the heat exchanger 6, and the air blower are provided inside the front cover 14 and the front panel 14 a, the side panel 15 and the upper panel 16, and the like. The fan 7 and the like are accommodated and protected.

  In the partition plate 2, a plurality (three) of reactors 18 are provided on the surface on the machine room 5 side shown in FIG. 3 in a state in which they are close to each other in the vertical direction via attachment members 181 for attaching the reactors 18. It is attached.

  Since the reactors 18 having a weight of about 2.5 kg × 3 = about 7.5 kg are attached in close proximity to each other, the partition plate 2 is bent or deformed by the weight of the reactor 18. In order to increase the strength so that there is not, the reinforcing plate (not shown) is recessed (or protruded) so as to extend vertically or horizontally, or the attachment member 181 shown in FIG. Between these, it has the hollow part formed in the substantially quadrilateral shape by planar view.

  The blower fan 7 provided in the heat exchanger chamber 8 sucks outside air from the suction port 17 facing the heat exchanger 6 and then heat-exchanges the sucked air by the heat exchanger 6 to be provided on the front cover 14. The blowout port 141 is blown out.

  The electrical component box 4 provided in the upper part of the machine room 5 includes a side part 41 arranged side by side on a surface of the partition plate 2 on the machine room 5 side, and a side end part on the partition plate 2 in the vicinity of the one side part 41. A joining member 44 composed of a back surface portion 42 to be joined and the other side portion 43 integrally bent so as to be continuous with the back surface portion 42, and a front portion between the one side portion 41 and the other side portion 43. A front cover 45 that can be attached and a bottom surface portion 46 constituting a ventilation casing are formed in a box shape, and the upper surface portion is configured to be covered by the upper surface panel 16.

  Next, the detailed configuration of the electrical component box 4 described above, the arrangement of the substrates 10 accommodated in the electrical component box 4, the removal operation of the front cover 45 during maintenance, and the like are based on FIGS. Will be described in detail.

  The main control board 101 constituting the boards 10 is attached to the front lid 45 constituting the electrical component box 4, and the power supply board 102 for the compressor 3 is attached to the other side part 43.

  On the main control board 101, a light emitting diode (not shown) that displays an error by blinking, a setting switch (not shown), an operation switch (not shown) for collecting the refrigerant, and the like are arranged. There is no need to remove the front cover 14 having a large shape shown in FIG. 1, and the inspection and operation can be performed only by removing the front panel 14a having a small shape.

  In addition, among a plurality of control boards requiring a heat sink, an inverter board 104 is mounted on one side portion 41 constituting the electrical component box 4 as a control board for one compressor 3 provided with the first heat sink 107. The power factor correction board 103 as the other control board provided with the second heat sink 107 ′ is mounted on the back surface portion 42 constituting the electrical component box 4, and the power supply board 105 provided with the capacitor 11 as a heat generating component is provided. The electrical component box 4 is mounted on the bottom surface portion 46 constituting the bottom surface side.

  The inverter board 104, the power factor correction board 103, and the power supply board 102 described above are all mounted on the inner surface of the electrical component box 4, and the bottom portion 46 of the electrical component box 4 is shown in FIGS. In this way, a cylindrical ventilation casing having both left and right sides opened is formed, and the power supply board 105 on which the capacitor 11 is mounted as a heat generating component is mounted inside the ventilation casing.

  When the blower fan 7 is started, outside air sucked from an intake port 171 provided at a lower portion on the back side shown in FIG. 2 is passed through the machine room 5 shown in FIG. Flowing from one side of the left and right sides opened while rising to the other side, the condenser 11 mounted on the power supply board 105 is cooled, and then sucked into the heat exchanger chamber 8 to form the air outlet shown in FIGS. 141 will be blown out.

  As shown in FIG. 5, a first heat sink 107 for radiating a part with a large amount of heat is provided on one side 41 constituting the electrical component box 4. A second heat sink 107 ′ is provided for radiating heat from components having a small heat generation amount.

  The first heat sink 107 of the one side portion 41 is covered with a heat sink cover (not shown) and protrudes from the partition plate 2 toward the heat exchanger chamber 8, and the second heat sink 107 ′ of the back surface portion 42 is a heat sink cover 108. The air flow path including the communication hole 22 provided in the partition plate 2 is covered and is radiated in contact with the air flow flowing through the heat exchanger chamber 8 toward the outlet 141. ing.

  The main flow of air that flows through the heat exchanger chamber 8 toward the outlet 141 is a large amount of heat that protrudes into the heat exchanger chamber 8 by sucking a large amount of outside air from the suction port 17 by the activated blower fan 7. The first heat sink 107 that radiates the components is effectively cooled.

  Further, since the electrical component box 4 has air gaps and holes (not shown) so that air can circulate, a part of the outside air sucked from the intake port 171 on the back surface shown in FIG. As shown in FIG. 4, the electric component box 4 is circulated while moving up in the machine room 5 and mounted on the substrate 10 such as the inverter board 104, the power factor correction board 103, and the power supply board 102 disposed in the electric part box 4. It is possible to cool the electrical components that have been made.

  Further, a part of the outside air sucked from the rear air inlet 171 shown in FIG. 2 is covered by the heat sink cover 108 shown in FIG. 5 and the heat sink cover 108 while rising in the machine room 5 shown in FIG. The second heat sink 107 ′ flows into the air flow path including the second heat sink 107 ′ and the communication hole 22 provided in the partition plate 2, and radiates heat of the parts with a small heat generation amount covered by the heat sink cover 108. Will also cool down.

  Both side ends of the front lid 45 are detachably attached to the front ends of the one side portion 41 and the other side portion 43 constituting the electrical component box 4, and the front surface of the front lid 45 is shown in FIGS. 6 and 9. As shown, a main control board 101 constituting the boards 10 is mounted, and a connection terminal 47 to which a wiring 106 is connected is provided.

  Since the main control board 101 and the connection terminal 47 are provided on the front surface of the front cover 45, during maintenance of the main control board 101 and the connection terminal 47, the front panel 14a can be removed to perform work from the front side of the outdoor unit. Thus, the workability is improved, so that the main control board 101 which can be expected to perform maintenance work frequently can perform the work without removing the front cover 45.

  The main control board 101 provided on the front cover 45 is vertically placed closer to the rear than the front end position of the partition plate 2 as shown in FIGS. It has a configuration that secures enough space to mount electrical components on the side.

  Substrates 10 such as an inverter board 104 provided on one side 41 constituting the electrical component box 4, a power factor correction board 103 provided on the back part 42, and a power supply board 102 provided on the other side part 43, Similarly, the vertical installation facilitates maintenance work including replacement of mounted electrical components.

  The inverter board 104 is provided with an intelligent power module (IPM) as a component that generates heat. Similarly, the power factor correction board 103 is also provided with an intelligent power module (IPM) as a component that generates heat.

  A first heat sink 107 for cooling the intelligent power module (IPM) of the inverter board 104 is covered by a heat sink cover (not shown) and protrudes from the partition plate 2 to the heat exchanger chamber 8 side. A second heat sink 107 ′ for cooling the intelligent power module (IPM) 103 is covered with a heat sink cover 108 to form an air flow path including the communication hole 22 shown in FIG. 5 provided in the partition plate 2. As a result, both the first heat sink 107 and the second heat sink 107 ′ are radiated by the air flow that flows through the heat exchanger chamber 8 toward the outlet 141.

  Accordingly, the first heat sink 107 corresponding to the intelligent power module (IPM) of the inverter board 104 is provided on one side portion 41 of the electrical component box 4 so as to protrude from the partition plate 2 to the heat exchanger chamber 8 side. When the second heat sink 107 ′ corresponding to the intelligent power module (IPM) of the power factor improving substrate 103 is provided on the back surface portion 42 of the product box 4, the first heat sink 107 and the back surface provided on the one side portion 41. The heat dissipation of the second heat sink 107 ′ provided in the portion 42 can be effectively increased.

  The back surface portion 42 of the electrical component box 4 and the front lid 45 opposed to the back surface portion 42 are configured in a substantially parallel state as shown in FIG. 5 and are substantially perpendicular to the back surface portion 42 constituting the joining member. As shown in FIG. 5, the other side portion 43 that is bent and the one side portion 41 that faces the other side portion 43 are configured such that the front lid 45 side is widened. 4 has a configuration in which the back portion 42 and the front lid 45 are substantially parallel and formed in a substantially trapezoidal shape in plan view.

  And the front cover 45 of the electrical component box 4 is located behind the front end of the one side portion 41, and has a concave shape in cross section by forming the concave portion with the central portion rearward relative to the left and right side portions. And by mounting an electrical component in the recessed part approaching this back, this electrical component is accommodated in the back of the left and right sides with respect to both right and left sides.

  In addition, the partition plate 2 to which the side portion of the back surface portion 42 is joined has a rear portion protruding rearward from the back surface portion 42, and the partition plate 2 protruding rearward of the back surface portion 42 includes a portion shown in FIG. The communication hole 22 shown in FIG.

  Thus, the second heat sink 107 ′ provided on the back surface portion 42 of the electrical component box 4 is covered with the heat sink cover 108 to form an air flow path including the communication hole 22 of the partition plate 2. Since the rear portion protrudes rearward from the back surface portion 42, the rear portion of the partition plate 2 provided with the communication holes 22 is provided so as not to protrude rearward, and the electrical component box 4 is compact. Thus, the space for arranging the second heat sink 107 'can be sufficiently secured.

  In addition, since the 1st heat sink 107 provided in the one side part 41 of the electrical component box 4 is protruded and provided in the heat exchanger chamber 8 side from the partition plate 2, the electrical component box 4 can be comprised compactly. Thus, the space for arranging the first heat sink 107 can be sufficiently secured.

  Further, a reinforcing flange 21 as shown in FIG. 8 is formed at least at the upper end and the front end of the partition plate 2, and a reinforcing flange 411 is formed at least at the upper end and the front end of the one side portion 41 constituting the electrical component box 4. Reinforcing flanges 421 are formed at least at the upper and lower ends of the back surface portion 42, and reinforcing flanges 431 are formed at the upper and lower ends and the front end of the other side portion 41, thereby reinforcing the strength of the partition plate 2 and reinforcing The strength of the electrical component box 4 joined to the partition plate 2 is also reinforced.

  Since the strength of the electrical component box 4 is such that the back surface portion 42 is joined to the partition plate 2 near the one side portion 41, the partition plate 2 is made a part of the constituent members of the electrical component box 4. Thus, the strength of the partition plate 2 can be effectively reinforced, and at the same time, a part of the electrical component box 4 can be firmly fixed to the partition plate 2.

  When replacing an electrical component (not shown) mounted on the substrate 10 with respect to the substrate 10 disposed inside the electrical component box 4, in the conventional technique, the electrical component box 4 (entire) is removed from the machine room 5. Since it is necessary to remove not only the front panel 14a but also the side panel 15 and the top panel 16, it is necessary to remove the electrical component box 4 from the machine room 5 without removing the electrical component box 4 in the present invention. It is possible to replace the electrical components mounted on the boards 10 in the interior, and by removing only the front panel 14a and removing the front cover 45, the front part of the electrical component box 4 is opened to open the electrical component. The product can be exchanged.

  Therefore, the front lid 45 can be accurately positioned at the front part of the electrical component box 4 and can be easily attached in a temporarily fixed state, or can be removed to open the front part of the electrical component box 4. In this state, it can be easily fixed temporarily.

  A locking hole 412 as shown in FIG. 7 and FIG. 8 is provided at the front end of one side part constituting the electrical component box 4, and the front lid 45 corresponds to the locking hole 412. As shown in FIG. 7, an engaging claw 452 that can be engaged and disengaged is provided on one side end.

  Further, a locking hole 432 as shown in FIG. 8 is provided at the front end of the other side part constituting the electrical component box 4, and the other side end of the front cover 45 is provided corresponding to the locking hole 432. As shown in FIG. 9, a locking claw 451 that can be engaged and disengaged is provided.

  Thereby, the front cover is attached to the front portion of the electrical component box 4 by locking the first temporary fixing portion 12 composed of the locking hole 412 and the locking hole 432, and the locking claw 452 and the locking claw 451, respectively. 45 can be temporarily fixed, and the front cover 45 that has been positioned and temporarily fixed is fixed by screwing (not shown).

  At the time of maintenance of the substrates 10 arranged inside the electrical component box 4, a screw (not shown) for fixing is used when the front panel 45 a is removed and the front cover 45 is removed to open the front part of the electrical component box 4. The front cover 45 is temporarily fixed, the locking claw 452 and the locking claw 451 are detached from the locking hole 412 and the locking hole 432, and the front cover 45 is removed. As shown in FIG. 7 to FIG. 9, the one side is turned around the center and the front part of the electrical component box 4 is opened, and the locking claw 451 and the locking hole for locking the locking claw 451 are provided. The front lid 45 can be temporarily fixed by locking with the second temporary fixing portion 13 including a locking hole 433 provided on the side surface near 432.

  At that time, as shown in FIGS. 6 and 7, the wiring 106 routed in and out of the electrical component box 4 can be removed with the front cover 45 in a state where most of the wiring 106 is not removed, In addition, since the removed front lid 45 can be rotated and temporarily fixed by the second temporary fixing portion 13, it is possible to eliminate the trouble of removing most of the wiring 106 during maintenance inside the electric component box 4. The front part of the box 4 can be opened, and maintenance workability can be greatly improved.

  As described above, with the configuration according to the present invention, it is possible to completely remove the wiring 106 connected to the electrical component 4 and the fastening portion of the electrical component box 4 without removing the electrical component box 4 from the machine room 5 during maintenance. Without removing the front cover 45, the front cover 45 is removed and rotated, and the front temporary cover 45 is temporarily fixed and the front part of the electrical component box 4 is opened. The outdoor unit of the air conditioner is configured such that the work at the time of maintenance can be efficiently performed by keeping the front part of the air conditioner closed.

It is the perspective view which looked at the outdoor unit of the air conditioner by this invention from the front side. It is the perspective view which looked at the outdoor unit of the air conditioner by this invention from the back side. It is a perspective view which shows the state which removed the front panel and electrical component box of the machine room front part of the outdoor unit of the air conditioner by this invention. It is a perspective view which shows the machine room and heat exchanger room of the outdoor unit of the air conditioner by this invention. It is a 1st principal part perspective view of the outdoor unit of the air conditioner by this invention. It is a 2nd principal part perspective view of the outdoor unit of the air conditioner by this invention. It is a 3rd principal part perspective view of the outdoor unit of the air conditioner by this invention. It is a 4th principal part perspective view of the outdoor unit of the air conditioner by this invention. It is a 5th principal part perspective view of the outdoor unit of the air conditioner by this invention. It is a principal part perspective view of the outdoor unit of the air conditioner by a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bottom plate 1a Leg part 2 Partition plate 21 Flange 22 Communication hole 3 Compressor 4 Electrical component box 41 One side part 411 Flange 412 Locking hole 42 Back surface part 421 Flange 43 Other side part 431 Flange 432 Locking hole 433 Locking hole 44 Joining member 45 Front cover 451, 452 Locking claw 46 Bottom portion 47 Connection terminal 5 Machine room 6 Heat exchanger 7 Blower fan 8 Heat exchanger room 9 Electrical component 10 Substrate 101 Main control board 102 Power supply board 103 Power factor improvement board 104 inverter board 105 power supply board 106 wiring 107 first heat sink 107 'second heat sink 108 heat sink cover 11 capacitor 12 first temporary fixing part 13 second temporary fixing part 14 front cover 141 outlet 14a front panel 15 side panel 16 upper panel 17 Suction port 171 Suction port 18 Reactor

Claims (3)

A plurality of boards in which the interior is partitioned into a machine room including a compressor and an electrical component box by a partition plate and a heat exchanger chamber including a heat exchanger and a blower fan, and the electrical component is mounted on the electrical component box In an air conditioner outdoor unit in which
The electrical component box has one side portion arranged side by side with the partition plate, a back surface portion joined to the partition plate in the vicinity of the same side portion, and a joining member composed of the other side portion connected to the back surface portion, and the one side A front lid that is detachably attached to the front part between the front part and the other side part, and a bottom part that constitutes a ventilation casing,
A main control board for the blower fan constituting the boards is attached to the front lid, a power supply board for the compressor is attached to the other side part, and a plurality of control boards requiring a heat sink, One control board with a first heat sink is mounted on the one side, the other control board with a second heat sink is mounted on the back surface, and a power board with a heat generating component is on the bottom surface An outdoor unit for an air conditioner, which is mounted in a ventilation casing.   A first temporary fixing portion temporarily fixed when the front lid is attached to a front portion of one side portion and the other side portion of the electrical component box and the front lid corresponding thereto; and the other side of the front lid The outdoor unit of the air conditioner according to claim 1, further comprising a second temporary fixing portion that is temporarily fixed when the front portion is opened by turning one side around the center.   The outdoor unit for an air conditioner according to claim 1 or 2, wherein a front cover of the electrical component box is located behind the front end of the one side part.

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